End plug for a writing instrument



FIG. 1 is a front view showing my new design, the rear view being a mirror image thereof;

FIG. 2 is a left side elevational view, the right side elevational view being a mirror image thereof;

FIG. 3 is a plan view thereof; and,

FIG. 4 is a perspective view taken from the front, side, and above thereof.

The broken line showing a writing instrument is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an “end plug for a writing instrument”, as shown and described. 